I suggest at least 72 hours between max workouts. Establishing a good base of strength in this early base period is a good plan. Those exercises will work well. After 8 week of this I would suggest doing 1x/week Hill Sprints/Hill Bounding workout. See our books for details. This is the best way for runners to build sport specific leg power. It will help you on steep hills.
During this base period I thin it is fine to mix in some hilly runs. The Max strength workouts should not leave you too tired.